公开(公告)号：WO2006114742A2

公开(公告)日：2006-11-02

申请号：PCT/IB2006/051240

申请日：2006-04-21

Applicant: PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBH ,  KONINKLIJKE PHILIPS ELECTRONICS N. V. ,  DEPPE, Carsten ,  MUNTERS, Tom ,  HOOIJER, Christofher Daniel Charles ,  FEIJEN, Hans ,  HABETS, Sander

Inventor： DEPPE, Carsten ,  MUNTERS, Tom ,  HOOIJER, Christofher Daniel Charles ,  FEIJEN, Hans ,  HABETS, Sander

CPC classification number: H04N9/3114 ,  H04N9/3155 ,  H04N9/64 ,  H05B41/2883 ,  H05B41/2887 ,  Y02B20/202

Abstract: A method for operating a projection system (1) is described, wherein a brightness level (B1, B2, B3, B4, B5, B6) in an image (IM) is represented by the total length of a number of light switch-on phases within a particular image cycle (VT). A high pressure discharge lamp (2) of the projection system (1) is operated via a lamp driver with an essentially square-wave alternating current (IL) SO that an overshoot sequence (O), which occurs in the alternating current (IL) after a current zero crossing during operation of the high pressure discharge lamp (2), has a frequency so high that for each possible brightness level at least one full period (P) of the overshoot sequence (O) lies essentially within a light switch- on or switch-off phase (ts) following the zero crossing. A projection system (1) and a lamp driver (10) for a high pressure discharge lamp (2) in such a projection system (1) are also described.

Abstract translation: 描述了一种用于操作投影系统（1）的方法，其中图像（IM）中的亮度级（B1，B2，B3，B4，B5，B6）由多个光接通的总长度 在特定图像周期（VT）内的相位。 投影系统（1）的高压放电灯（2）通过具有基本上方波的交流（IL）SO的灯驱动器操作，在交流电（IL）中发生的过冲序列（O） 在高压放电灯（2）的操作期间的电流过零之后，具有如此高的频率，使得对于每个可能的亮度级，过冲序列（O）的至少一个全周期（P）基本上位于光开关 - 在零交叉之后的开启或关闭阶段（ts）。 还描述了在这种投影系统（1）中的用于高压放电灯（2）的投影系统（1）和灯驱动器（10）。

公开(公告)号：WO2006114742A3

公开(公告)日：2007-04-05

申请号：PCT/IB2006051240

申请日：2006-04-21

Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  DEPPE CARSTEN ,  MUNTERS TOM ,  HOOIJER CHRISTOFHER DANIEL CHA ,  FEIJEN HANS ,  HABETS SANDER

Inventor： DEPPE CARSTEN ,  MUNTERS TOM ,  HOOIJER CHRISTOFHER DANIEL CHA ,  FEIJEN HANS ,  HABETS SANDER

IPC: H04N9/31

CPC classification number: H04N9/3114 ,  H04N9/3155 ,  H04N9/64 ,  H05B41/2883 ,  H05B41/2887 ,  Y02B20/202

Abstract: A method for operating a projection system (1) is described, wherein a brightness level (B 1 , B 2 , B 3 , B 4 , B 5 , B 6 ) in an image (IM) is represented by the total length of a number of light switch-on phases within a particular image cycle (VT). A high pressure discharge lamp (2) of the projection system (1) is operated via a lamp driver with an essentially square-wave alternating current (I L ) SO that an overshoot sequence (O), which occurs in the alternating current (I L ) after a current zero crossing during operation of the high pressure discharge lamp (2), has a frequency so high that for each possible brightness level at least one full period (P) of the overshoot sequence (O) lies essentially within a light switch-on or switch-off phase (t s ) following the zero crossing. A projection system (1) and a lamp driver (10) for a high pressure discharge lamp (2) in such a projection system (1) are also described.

Abstract translation: 描述了一种用于操作投影系统（1）的方法，其中亮度级（B 1，B 2，B 3，B 3， 图像（IM）中的SUB> 4 B 5，B 6 6）由多个光接通相的总长度表示 特定图像周期（VT）。 投影系统（1）的高压放电灯（2）通过具有基本上方波的交流（I L L）SO的灯驱动器来操作，该过冲序列（O）是过冲序列 在高压放电灯（2）的操作期间在电流过零之后，在交流电流（I L L）中发生的频率具有如此高的频率，使得对于每个可能的亮度水平至少一个全周期 过零序列（O）的P）基本上位于零交叉之后的光接通或关断阶段（t S S S S S S S S S）。 还描述了在这种投影系统（1）中的用于高压放电灯（2）的投影系统（1）和灯驱动器（10）。